Clamping device for ball-bearings.



` J. VORRABER. CLANZPXNLQEIHCE FOR BALL BEARINGS` Patn'te E613., 25, 19H.

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unanimita DEVICE ron BALL-ensalada Specification of Letters Patent.

Patented Dec. 25, i917.

Application filed August 3, 1916. Serial No. 112,955*

varia, Germany, civil engineer, have inventi ed certain new and useful-Improvements in Clamping Devices for Ball- Bearings, of which the following is a specificatlon.

' My invention relates to clamping devices for ball bearings and its object is to provide a device by means of Which standard ball bearings the inner race of Which has a cylindiical bore may be clamped on a shaft by a slight axial displacement of a nut. This has the advantage that the casing for the bearing can be made short, little space being required for displacing said nut.

1With this object in View, I provide a cylindrical split sleeve on a shaft, said sleeve having prserably a plurality of projections which may -be conical, for instance, and a threaded portion, and on such sleeve is arranged a further sleeve, also split, and having preferably a plurality of recesses correspondingsteSthe projections of the inner sleeve. The cuts'rde of this outer sleeve is cylindrical, and tesit "is, fitted the inner race of a ball bearing. *Byudisplacing' thenut` on the threaded portion'` of the inner sleeve, an axial thrust may be-excrted on the outer sleeve which causes the two sets of coperating'projections and recesses in the -sleeves to become displaced relatively to each other. As the outer sleeve is unable tocapand, being held by the inner ball race fitted on it, the inner sleeve will be compressed and lirmly clamped on its shaft.

The pitch of the said projections and recesses being considerable, a strong clamping action is effected by a vcomparatively short relative displacement ofthe two sleeves which is an advantage' of my invention as compared .with the wel] known clamping sleeves4 for cylindrically bored radial ball bearings.

Instead of providing an outer sleeve having a series of recesses, I may arrange a plurality of split rings on the projections of the inner sleeve which are adapted to be displaced relatively to them.

Reference is to be had to the accompanying drawingsin which I have illustrated two embodiments of my invention by Way of example.

-'Referring to Figure 1, a is a shaft on which is arranged an inner sleeve b split 4 at c. This sleeve has authreaded portion d on which is carried a nut e, and a plurality of conical projectionsf or faces f. An outer sleeve g, also split, is placed on theinner sleeve so that the conical recesses with which it is provided' engage the conical projections f of sleeve 7). Fitted on this outer sleeve g is the inner race L of a ball bearing the balls of which are indicatedy at 2". It is the outer race oi the ball bearing.

A very slight inodiiication as illustrated in Fig. 2 is very similar to the one justdescribed, except for the fact that instead of having conical recesses', the outer sleeve is formed by a plurality of split rings l, each of which its one of the conical projections f on Sleeve'.

In both cases, it nut e is turned on the threaded portion of sleeve @it will exert'an .axial thrust on the outer sleeve g or the rings Z, respectively, causing the inner sleeve to become clamped firmly on lts shaft n I claim:

1. In a clamping device for ball bearings, I

'of annular, conical projections and said outer sleeve being provided with a plurality of annular, conical recesses adaptedto receive said projections, and a nut engaging with the threaded end of the inner sleeve and adapted to coact With the outer sleeve to adjust it longitudinally of the inner sleeve; Y' 2. In a clamping device for ball bearings, an inner split sleeve' on a shaft, an outer longitudinally split sleeve on said inner sleeve, said outer sleeve holding the inner race of a ball bearing, means for displacing said sleeves axially in relation to each other, a plurality of annular conical projections on said inner sleeve and conical rec'esses in said outer sleeve, said recesses fitting said projections. f, y*

3. In a clamping device for ball bearings,r an inner split sleeve on a shaft, an outer split sleeve on said inner sleeve, said outer sleeve holding the inner race of a ball bearing, a nut on said inner sleeve engaging said outer sleeve. a conical annular projection'on sald inner sleeve and a conical recess on said outer sleeve, said recess fitting said projecsplit. Sleeve on said inner sleeve, said outer sleeve holding the inner race of a ball bearinn'.y a mit on said inner sleeve engaging said outer sleeve, conical projections on Said i11- ner sleeve and conical recesses in Said outer slcc-vc, said recefses fitting said projections.

in a clznnping device for ball bearings havinjf sanllard cylindrical bore, an inner split-:sleeve on a an; outer split-sleeve on said inner` cere, Said outer sleeve cylindrie-al al irs surface and holding the inner race of a ball bearing', means for displacing Said. sleeves axially in relation to nach other, annular, conical projections on one ci l,id sleeves and recesses in the other, filling ald projections,

G. In a clamping device for ball bearingshaving standard cylindrical-bore, an inner split-sleeve on a shaft, an outer split-sleeve on said inner sleeve, said outer sleeve cylindrical at its outer surface and holding the inner race of a ball bearing, means for displacing,r said sleeves axially in relation to each other, annular conical projections on sa' l inner sleeve and conical recesses in said outer sleeve, Said recesses fitting the projections.

In testimony whereof, l affix my Signature, in preSence of two witnesses.

JOSEF VORRABER.

Witnesses:

W. S. SPUYiLBnnG., HARRY SCHMID. 

